Consists of "In-Process" and "Other Non-Indexed Citations" records provided by the National Library of Medicine (NLM). "In-Process" records are records that will be added to MEDLINE after they have been enhanced with Medical Subject Headings (MeSH). "Other Non-Indexed Citations" are records from journals found in PubMed but not selected for MEDLINE, and these records are constantly changing and will not be added to MEDLINE. The database is regularly updated, depending on NLM's update schedule.

Note: To search this database by keyword, users will need to deselect the "Map Term to Subject Heading" checkbox because the file does not include MeSH. Also, be aware that these citations have not gone through NLM's quality control process.